FKN12-27.5 D bipolar load switch and FKN12-27.5IRD bipolar combined electrical appliance are mainly used in the distribution facilities at the front end of 27.5KV transformer in railway traction network for load control and short-circuit protection. Because the combined wall can protect electrical equipment such as transformer more effectively than circuit breaker, it can be used for dry-type transformer high temperature trip protection, heavy gas trip protection, false electrification trip protection, etc.

 Executive standards

GB311.1-2012 Insulation Coordination of High Voltage Transmission and Transformation Equipment

G83804-2004 3.6-40.5kV high-voltage AC load switch

GB/T 11022-2011 Public Technical Requirements for High Voltage Switchgear and Control Equipment Standards

DL/T593-2006 Common Technical Requirements for High-voltage Switchgear and Control Equipment Standards GB16926-2009 AC High-voltage Load Switch-Fuse Combinations

G8/T1985-2014 High Voltage AC Disconnectors and Earthing Switches

GB/T 15166-2008 AC High Voltage Fuses 

Working Condition

Ambient air temperature shall not exceed+40 ℃ - 45 ℃, and the average maximum temperature within 24h shall be+35 ℃;

24h maximum average relative humidity ≤ 95%. Maximum average relative humidity in one month ≤ 90%;

Surrounding air is not obviously polluted by dust, smoke, corrosive and or flammable gas, steam or salt mist:

Altitude ≤ 1000m;

No frequent severe vibration:

Pollution resistance grade: II